Tetrasodium pyrophosphate 10AQ
General Product Information
| Article | Tetrasodium pyrophosphate 10AQ |
| Synonyms | E450(iii), Tetrasodium pyrophosphate decahydrate, Tetrasodium diphosphate, Pyrophosphate, Sodium pyrophosphate, TSPP |
| CAS No. | 7722-88-5 |
| EEG No. | – |
| EINECS No. | 231-767-1 |
| IMO | – |
| Tariff Code | 28353900 |
| UN No. | – |
| VLG/ADR | – |
Description
Tetrasodium pyrophosphate is an inorganic compound belonging to the Class of pyrophosphates. It is a salt of sodium and pyrophosphoric acid, often used as a water softener, emulsifier, stabilizer and dispersant in various industrial and commercial applications. It is common in the chemical industry, food production and cleaning agents.
Characteristics
- Odor: Odorless.
- Hygroscopic: Yes.
- Color: White to light yellow.
- Grade: Food.
- Solubility: Highly soluble in water, insoluble in alcohol.
- Taste: Slightly alkaline.
- Shape: Crystalline powder.
Physical & Chemical Properties
| Chemical Structure | Na4P2O7 |
| Molar Weight | 265.9 g/mol |
| Melting Point | >400 °C (decomposes) |
| Boiling Point | – |
| Density | – |
| Refractive Index | – |
| pH | 9-10 (on 1% solution) |
Interessing Links
- Codex Alimentarius (FAO/WHO) – Guidelines and standards for food additives and ingredients.
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- European Food Information Council (EFIC)
- European Food Safety Authority (EFSA) – Information on the safety and uses of food additives and ingredients.
- PubChem – Sodium Pyrophosphate – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Tetrasodium pyrophosphate
Applications
Tetrasodium pyrophosphate is applied in various ways, for instance:
1. Food Industry
Tetrasodium pyrophosphate is used as a food additive E450(iii). It acts as a raising agent, stabilizer and emulsifier in various products such as meat products, fish products, cheese and bakery products. It provides water binding and improves texture and shelf life.
2. Water Treatment
In water treatment processes, TSPP helps reduce scale and lower water hardness, which is beneficial for industrial plants.
3. Detergents & Detergents
Due to its ability to bind calcium and magnesium ions, tetrasodium pyrophosphate acts as a water softener, significantly increasing the effectiveness of detergents and cleaning products.
4. Chemical Industry
TSPP is used as a dispersant and stabilizer in pigments, coatings, ceramics and various other products. It contributes to improved processability and product quality.